USU is a bulgarian Linux distribution based on Ubuntu with great variety of software:
openoffice,firefox,skype,shotwell,gwibber,deluge,filezilla,empathy,video convertors etc... ,pretty much everything you may need.
5.2 version is based on Ubuntu 10.04.2
There is USU 6 test version which can be found here:
Official USU homepage is:
Please download,vote,rate and comment.